Quiz about Kepler's Third Law

Question 1

Kepler's 3rd law tell us that __ would be dependent on __.

Accepted Answer

orbital period ; distance

Answer

distance ; orbital period

Question 2

The farther away a planet is from the sun, the _______ it takes it to orbit the sun once.

Accepted Answer

longer

Answer

shorter

Question 3

The "Law of Harmonies" is which of Kepler's Laws?

Accepted Answer

3rd

Answer

1st

Answer

2nd

Answer

4th

Question 4

When a planet orbits the Sun, one of the foci of the elliptical orbit is

Accepted Answer

the Sun

Answer

the axis

Answer

the perihelion

Answer

the center

Question 5

What unit to we usually use to to measure a planet's orbital period?

Accepted Answer

year

Answer

light year

Answer

day

Answer

astronomical unit

Question 6

This formula is about

Accepted Answer

Kepler's Third Law

Answer

Kepler's First Law

Answer

Kepler's Second Law

Question 7

According to Kepler's Third Law, the square of the orbital period of a planet is proportional to the cube of its average distance from the sun. Which of the following equations represents this law?

Accepted Answer

$$T^2 \propto R^3$$

Answer

$$T^3 \propto R^2$$

Answer

$$T \propto R$$

Answer

$$T^2 \propto R$$

Question 8

If a planet's orbital period is 8 Earth years, what is the approximate average distance from the sun in astronomical units (AU) according to Kepler's Third Law?

Accepted Answer

16 AU

Answer

4 AU

Answer

8 AU

Answer

64 AU

Question 9

Which of the following best describes Kepler's Third Law?

Accepted Answer

The square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit.

Answer

The orbit of a planet is an ellipse with the sun at one of the two foci.

Answer

A line segment joining a planet and the sun sweeps out equal areas during equal intervals of time.

Answer

The force of attraction between two bodies is directly proportional to the product of their masses.

Question 10

A newly discovered exoplanet orbits its star at a distance of 10 AU. Using Kepler's Third Law, estimate its orbital period.

Accepted Answer

31.6 Earth years

Answer

10 Earth years

Answer

100 Earth years

Answer

1 Earth year

Question 11

Kepler's Third Law can be used to determine which of the following properties of a planet's orbit?

Accepted Answer

The orbital period if the average distance from the sun is known

Answer

The shape of the orbit

Answer

The speed of the planet at any point in its orbit

Answer

The mass of the planet

Question 12

If the orbital period of a planet is known, what additional information is needed to calculate the average distance from the sun using Kepler's Third Law?

Accepted Answer

No additional information is needed

Answer

The mass of the planet

Answer

The radius of the planet

Answer

The semi-major axis of the orbit

Question 13

Which of the following is a real-world application of Kepler's Third Law?

Accepted Answer

Calculating the distance of a satellite from Earth based on its orbital period

Answer

Predicting the weather patterns on Earth

Answer

Determining the chemical composition of a distant star

Answer

Measuring the speed of light

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